Efficiency and Functionality of a Contra-Rotating Wind Turbine
Kullmann, Felix (2015)
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Goal of this study was to evaluate in terms of efficiency and functionality a newly modelled contra-rotating wind turbine. This new wind turbine was examined in order to find more ecological and econmical technologies in the wind energy sector. Betz Limit will be proofed for single rotor wind turbines and the higher possible energy extraction coefficient for double rotor wind turbines will be explained. Main source for the experimental set-up and validation of the found results is P. Santhana Kumar’s et al study of ”Computational and Experimental analysis of a Counter-Rotating Wind Turbine system” (2013). The study has shown that contra-rotating wind turbines are able to have a 26-36% higher power output. Taking into account the higher construction costs leaves the CRWT to be ~5% more efficient than a comparable SWRT. CRWTs are an effective way to boost the renewable energy sector and make wind energy more reliable. With further thinking going into this technology and first real-life attempts CRWTs can support the change of the world to become more environmentally friendly.